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dc.contributor.authorHobbs, Laura
dc.contributor.authorBanas, Neil S.
dc.contributor.authorCohen, Jonathan H.
dc.contributor.authorCottier, Finlo Robert
dc.contributor.authorBerge, Jørgen
dc.contributor.authorVarpe, Øystein
dc.date.accessioned2021-07-01T13:30:49Z
dc.date.available2021-07-01T13:30:49Z
dc.date.issued2021-02-24
dc.description.abstractThe predation risk of many aquatic taxa is dominated by visually searching predators, commonly a function of ambient light. Several studies propose that changes in visual predation will become a major climate-change impact on polar marine ecosystems. The High Arctic experiences extreme seasonality in the light environment, from 24 h light to 24 h darkness, and therefore provides a natural laboratory for studying light and predation risk over diel to seasonal timescales. Here, we show that zooplankton (observed using acoustics) in an Arctic fjord position themselves vertically in relation to light. A single isolume (depth-varying line of constant light intensity, the value of which is set at the lower limit of photobehaviour reponses of Calanus spp. and krill) forms a ceiling on zooplankton distribution. The vertical distribution is structured by light across timescales, from the deepening of zooplankton populations at midday as the sun rises in spring, to the depth to which zooplankton ascend to feed during diel vertical migration. These results suggest that zooplankton might already follow a foraging strategy that will keep visual predation risk roughly constant under changing light conditions, such as those caused by the reduction of sea ice, but likely with energetic costs such as lost feeding opportunities as a result of altered habitat use.en_US
dc.identifier.citationHobbs, Banas, Cohen, Cottier, Berge, Varpe. A marine zooplankton community vertically structured by light across diel to interannual timescales. Biology Letters. 2021;17(2)en_US
dc.identifier.cristinIDFRIDAID 1917670
dc.identifier.doi10.1098/rsbl.2020.0810
dc.identifier.issn1744-9561
dc.identifier.issn1744-957X
dc.identifier.urihttps://hdl.handle.net/10037/21670
dc.language.isoengen_US
dc.publisherThe Royal Societyen_US
dc.relation.journalBiology Letters
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/POLARPROG/244319/Norway/Arctic Ocean ecosystems - Applied technology, Biological interactions and Consequences in an era of abrupt climate change//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/KLIMAFORSK/300333/Norway/The impact of artificial light on arctic marine organisms and ecosystems during the polar night//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/SFF/ 223254/Norway/Centre for Autonomous Marine Operations and Systems/AMOS/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.titleA marine zooplankton community vertically structured by light across diel to interannual timescalesen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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